If you're on this page you know what this product is intended to do. The ideal scenario is to never have to write about how the ABS unit itself works, so I'll focus on the pack. In terms of size, 32+7 is definitely big for a day pack. I'm coming off an old Osprey Switch 26, but at this price figured it's time to add the safety element. It's obviously larger, heavier, bulkier than a 26l pack, but the space is well thought out. As the description says, there are pockets for just about everything, including goggles, maps, etc. Likely overkill for most of the touring I do around the Central Wasatch, but will be handy for yurt trips and days on the sled.
In terms of setting up the ABS unit, I went to Youtube and followed a long. It took about 5 minutes, but it's super obvious that you have it correct. Everything feels super sturdy on this pack. Replacing plastic clips/buckles with metal gives me confidence this thing isn't coming off unless you want it to. Overall, excited to put it to use this winter.